Is it going to rain?
Probability
Level
1
If the probability that it rains tomorrow is 0.6, what is the probability that it does not rain tomorrow?
The answer is 0.4.
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Using probability by complement , we know that the sum of the probability that it rains and the probability that it does not rain must be 1 (since it will either be raining outside or not raining outside). To determine the probability that it does not rain, subtract the probability that it does rain from 1.
1 − 0 . 6 = 0 . 4 .